Improvement in h em m ing-guides for sewing-machines



H. B. ODIORNE.

Hemming Device for Sewing Machines.

Paten ted Aug. 31, 1858.

IND. 21,355.

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tion.

UNITED STATES PATENT OFFICE.

HENRY B. ODIORNE, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN HEMMlNG-GUIDES FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 2|,355, dated August31, 1858.

To all whom it may concern:

Be it known that I, HENRY B. ODIORNE, of the city of Philadelphia, inthe county of Philadelphia and State of Pennsylvania, have invented anew and Improved Hemmin'g Device for Sewing-Machines; and I do herebydeclare the following to be a full and exact description of the. same,reference being had to the accompanying drawings, and to the let ters ofreference marked thereon.

My invention consists in constructing the pressure-pads ofsewing-machineswith certain recesses, formed and arranged substan tiallyin the manner fully set forth hereinafter, and in combining with thesame a curved tongue or a projecting curved lip, in order that by thejoint action of the said recesses and curved tongue, or theirequivalents, the edge of the fabric may be turned over, and the twofolds necessary for producing the re quired hem formed as the fabric ismoved forward by any of the usual feeding devices of sewing-machines.

In order to enable others skilled in the art to make and use myinvention, I will now proceed to describe its construction and opera Onreference to the drawings which form a part of this specification,Figure 1 is a plan view of my improved hemming-guide; Fig. 2, aperspective view, looking in the direct-ion of the arrow 1., Fig. 1;Fig.3, a perspective view, looking in the direction of the arrow 2,.

Fig. 1; Fig. I, an end view of the instrument, looking in the directionof the arrow 3, Fig. 1; Fig. 5, a section on the line 5 6, Fig. 1; Fig.6, a section on the line 7 8, Fig. 1; Fig. 7, a section on the line'910, Fig. 1; Fig. 8, an inverted plan view of the hammer 5 Fig. 9, a planview with the fabric removed; Fig. 10, a longitudinal section on theline 11 12, Fig. 9; Fig. 11, a diagram illustrating the formation of thefolds.

In the whole of the above views, which are drawn to a scale of doublethe actual size, similar letters refer to similar parts.

A is a metal plate, either secured to or otherwise forming a part of thepressure-pad of any ordinary sewing-machine, and in this plate is ahole, a, for the passage of the needle. In the under side of the plateis a recess, 1), Figs. 3, 8, and 10, communicating. with the needle-hole0,. Now, this recess b, as will be observed on reference to Fig. 10, isstraight, and parallel with the top and bottom of the plate throughout aportion of its length. From a poi nt near the edge of the needle-hole a,however, it is rounded off with a gradual curve, which terminatesabruptly at an edge, 0, on the upper surface of the plate, this edgebeing situated midway, or thereabout, between the opposite ends of theplate. A narrow slot, (1, is cut entirely through the plate, and thisslot, on the under side of theplate, communicates with the recess 1),one edge, c, Fig. 8, of the slot cl being continued in a straight lineand forming one edge of the recess 1), the opposite edge,f, of thelatter being separated from the opposite edge, h, of the slot d by anabrupt shoulder, c, Fig. 8. The edge h of the slot cl does not extend tothe upper surface of the plate, but is a short distance below it, asbest observedon' reference to Figs. 2, 4, and A longitudinal concaverecess, m, is formed in the upper surface of the plate A, and of thisrecess the line j forms one edge and the edge h of the slot (1 theopposite edge. The bottom of this concave recess is not straight, but,as seen in Fig. 10, is rounded off gradually until it terminates at theshoulder c. It

will thus be seen that there is a direct communication between theconcave recess m and the recess 1) on the under side of the plate, thepoint of communication being between the rounded termination of theconcave recess toward the lower surface of the plate and the roundedtermination of the recess 1) toward the upper surface of the plate. Itwill also .be seen that there is a direct communication between the slotd and the recess b.

To the upper surface of the plate A, I secure a tongue, B,which is bentto a peculiar form, and which is peculiarly situated as regards theabove-described parts. From the point where it is secured to the plateit is bent with a gen tle curve across the slot (1 and the edge h of thelatter, (see Fig. 9,) and assumes a position above the concave recess m.From the point where it crosses the edge h it is bent downward andfollows in the course of the concave recess. (See Fig. 10.) Before itreaches the point 0 it is bent inward toward the common edge e of theslot at and recess b,and, passing downward with a curve into the spacebetween the rounded termination of the concave recess m and that of the.recess b, terminates with a near that of the recess b, as seen in Fig.8. It

should be understood that this curved tongue,

z from the point where it is secured to the plate A to its termination,is entirely free from contact with the plate, and from all of theabovedescribed parts of the same.

The tongue B, as it appears when removed from the plate, may bedescribed as an irregular helix. The edge h, above alluded to, and whichforms the separation between the slot d and the concave recess m, isrounded oil down ward toward the shoulder i, in a similar manner to thebottom of the said recess.

Having now described the, method of con structing my improvedhennning-guide, I will now proceed to show the manner in which itaccomplishes the formation of the two folds of the hem on the edge ofthe fabric. I11 the first instance the latter is placed beneath theplate A and the cloth-plate of the sewing-machine, as seen in red lines,Fig. 4, the edge of the fabric being turned up into the slot (1, downinto the concave recess m, and between the latter and the tongue I), theamount of fabric within the slot cl thus turned into the said concaverecess being sufficient to form the two folds.

\Vhen the fabric has been drawn beneath the plate in the direction ofthe arrow 3, Fig. 1, as far as the point indicated by the line 5 6, theedge will have assumed the fornrrepresented in Fig. 5that is, itwillhavc a sharper bend,consequent upon the downward inclination of thebottom of the concave recess, that of the tongue B, and that of the edgeIt. WVhen the fabric arrives at the point 0, Fig. 1, the edge h hasterminated and ceases to control the fold,which has assumed the formrepresented in the diagram Fig. 11. Now, at this point 0 a commences therecess 12, into which the fold must enter as the fabric is drawn in thedirection of the arrow 3. As the fold is confined laterally in onedirection by the edge e and in the other by the tongue, and as thetongue is bent until its point nearly touches this edge,

it is evident that the fold, as it is drawn within the roundedinclination, must be pressed on the top by the latter, and must, whenarriving at the line 7 8, Fig. 1, have assumed the position within therecess 1) represented in Fig. 6-

that is, two folds are formed, and these two folds, as they are drawnforward into the shallower portion b, and after leaving and ceasing tobe in any way controlled by the point of the tongue, become compressedinto a compact mass, as seen in Fig. 7, in which state they pass in theform of a complete hem from underneath the plate. Prior to this,however, the needle, operating through the hole a, has, in conj unctionwith other parts of a sewing-machine, securely stitched the hem. It willnow be seen that as the edge of the fabric is drawn through theinstrument in the direction of the arrow 3, Fig. 1, a gradual curling orturning over of the edge takes place, beginning with the simple turnshown in Fig. 4 and terminating with a complete hem, as seen in Fig. 6.Thisturning over of the edge of the fabric is performedgraduallythroughout, and inthis respect differs from the device forwhich a patent was granted to S. I. Ohapin, February 19, 1856, which maybe said to consist of two devices similarto each other, one for formingthe first fold and the other for the second, the formation of the secondfold commencing abruptly after that of the first.

Instead of the curved tongue for assisting to form the folds, a curvedprojecting lip may be used with equal effect. In fact, the whole devicemay be considerably modified in appearance without altering theprinciple of its performance or the accomplishment of the result. I layno claim to any device described in the aforesaid patent of S. P.Ohapin, or to that of S. C. Blodgett, granted January 3, 1854; but Iclaimand desire to secure by Letters Patent I Constructing thepressure-pad of a sewingmadhine with recesses arranged and formedsubstantially as herein described, in combination with the curved tongueB or its equivalent, for the purpose specified.

In testimony whereof I have signed my name to this specification beforetwo subscribing witnesses.

I II. B. ODIORNE.

\Vitnesses:

HENRY HowsoN, HENRY ODIORNE.

